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Finding the Fourth Proportional to 153,157.92, 211,358.06 and 85,173.40

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Solution

The fourth proportional to 153,157.92, 211,358.06 and 85,173.40 is: 117,539.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,157.92 : 211,358.06 = 85,173.40 : x
  2. Step 2: Convert to fraction form
    153,157.92/211,358.06 = 85,173.40/x
  3. Step 3: Cross multiply
    153,157.92x = 211,358.06 × 85,173.40
  4. Step 4: Simplify right side
    153,157.92x = 18,002,084,587.60
  5. Step 5: Solve for x
    x = 18,002,084,587.60/153,157.92
  6. Step 6: Final answer
    x = 117,539.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.